The certifications are listed by job role. You'll notice that they are grouped by Implementation Engineer, Storage Administrator, Support Engineer, Installation Engineer, and Converged Infrastructure. When you click on the individual links, it will provide more information about the targetted audience. The first tab (Overview) will present you with a brief summary of what the exam covers, the second tab (Prepare) shows how to prepare for the exams and the third tab (Exam) lists the topics covered on the exams. You should find the answer to your questions by exploring deeper.
I hope that this answers your inquiry, please feel free to post more questions here or email me directly.
NetApp Certification and Accreditation Program Manager
yep, I am able to see that but still would be nice if you have one PDF where is everything listed with recommendations and path selections. Netapp has best support in industry ( I am dealing with like 30 different vendors) and I will welcome some kind of simplification and visual representation which path to take :-))))